[ 53.398166][ T11] ================================================================== [ 53.398396][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 53.398596][ T11] Read of size 8 at addr ffff8880087d00f8 by task kworker/u16:0/11 [ 53.398792][ T11] [ 53.398863][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 53.399059][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.399226][ T11] Workqueue: netns cleanup_net [ 53.399363][ T11] Call Trace: [ 53.399466][ T11] [ 53.399539][ T11] dump_stack_lvl+0x82/0xd0 [ 53.399681][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 53.399852][ T11] ? cleanup_net+0x932/0xa40 [ 53.399987][ T11] print_report+0xb4/0x270 [ 53.400118][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 53.400249][ T11] kasan_report+0xbd/0xf0 [ 53.400348][ T11] ? cleanup_net+0x932/0xa40 [ 53.400488][ T11] cleanup_net+0x932/0xa40 [ 53.400620][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.400757][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 53.400886][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 53.401020][ T11] ? lock_acquire+0x32/0xc0 [ 53.401156][ T11] ? process_one_work+0xe0b/0x16d0 [ 53.401302][ T11] process_one_work+0xe55/0x16d0 [ 53.401443][ T11] ? __pfx___lock_release+0x10/0x10 [ 53.401583][ T11] ? __pfx_process_one_work+0x10/0x10 [ 53.401713][ T11] ? assign_work+0x16c/0x240 [ 53.401846][ T11] worker_thread+0x58c/0xce0 [ 53.401975][ T11] ? __pfx_worker_thread+0x10/0x10 [ 53.402109][ T11] kthread+0x28a/0x350 [ 53.402213][ T11] ? __pfx_kthread+0x10/0x10 [ 53.402343][ T11] ret_from_fork+0x31/0x70 [ 53.402477][ T11] ? __pfx_kthread+0x10/0x10 [ 53.402614][ T11] ret_from_fork_asm+0x1a/0x30 [ 53.402756][ T11] [ 53.402856][ T11] [ 53.402923][ T11] Allocated by task 245: [ 53.403027][ T11] kasan_save_stack+0x24/0x50 [ 53.403158][ T11] kasan_save_track+0x14/0x30 [ 53.403285][ T11] __kasan_slab_alloc+0x59/0x70 [ 53.403423][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 53.403563][ T11] copy_net_ns+0xc6/0x340 [ 53.403662][ T11] create_new_namespaces+0x35f/0x920 [ 53.403794][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 53.403926][ T11] ksys_unshare+0x2a9/0x660 [ 53.404064][ T11] __x64_sys_unshare+0x31/0x40 [ 53.404198][ T11] do_syscall_64+0xc1/0x1d0 [ 53.404333][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.404500][ T11] [ 53.404571][ T11] Freed by task 11: [ 53.404673][ T11] kasan_save_stack+0x24/0x50 [ 53.404801][ T11] kasan_save_track+0x14/0x30 [ 53.404935][ T11] kasan_save_free_info+0x3b/0x60 [ 53.405071][ T11] __kasan_slab_free+0x38/0x50 [ 53.405210][ T11] kmem_cache_free+0xf8/0x330 [ 53.405347][ T11] cleanup_net+0x5a8/0xa40 [ 53.405473][ T11] process_one_work+0xe55/0x16d0 [ 53.405601][ T11] worker_thread+0x58c/0xce0 [ 53.405733][ T11] kthread+0x28a/0x350 [ 53.405830][ T11] ret_from_fork+0x31/0x70 [ 53.405954][ T11] ret_from_fork_asm+0x1a/0x30 [ 53.406081][ T11] [ 53.406147][ T11] Last potentially related work creation: [ 53.406279][ T11] kasan_save_stack+0x24/0x50 [ 53.406411][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 53.406546][ T11] insert_work+0x34/0x230 [ 53.406649][ T11] __queue_work+0x5fd/0xa40 [ 53.406779][ T11] queue_delayed_work_on+0x8c/0xa0 [ 53.406914][ T11] __inet_insert_ifa+0x751/0xb10 [ 53.407051][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 53.407184][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 53.407311][ T11] netlink_rcv_skb+0x130/0x360 [ 53.407450][ T11] netlink_unicast+0x44b/0x710 [ 53.407588][ T11] netlink_sendmsg+0x723/0xbe0 [ 53.407715][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 53.407854][ T11] ___sys_sendmsg+0xee/0x170 [ 53.407988][ T11] __sys_sendmsg+0x109/0x1a0 [ 53.408125][ T11] do_syscall_64+0xc1/0x1d0 [ 53.408261][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.408424][ T11] [ 53.408496][ T11] Second to last potentially related work creation: [ 53.408652][ T11] kasan_save_stack+0x24/0x50 [ 53.408785][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 53.408919][ T11] insert_work+0x34/0x230 [ 53.409023][ T11] __queue_work+0x5fd/0xa40 [ 53.409148][ T11] queue_delayed_work_on+0x8c/0xa0 [ 53.409278][ T11] __inet_insert_ifa+0x751/0xb10 [ 53.409416][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 53.409549][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 53.409685][ T11] netlink_rcv_skb+0x130/0x360 [ 53.409832][ T11] netlink_unicast+0x44b/0x710 [ 53.409966][ T11] netlink_sendmsg+0x723/0xbe0 [ 53.410092][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 53.410219][ T11] ___sys_sendmsg+0xee/0x170 [ 53.410349][ T11] __sys_sendmsg+0x109/0x1a0 [ 53.410479][ T11] do_syscall_64+0xc1/0x1d0 [ 53.410605][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.410761][ T11] [ 53.410824][ T11] The buggy address belongs to the object at ffff8880087d0040 [ 53.410824][ T11] which belongs to the cache net_namespace of size 6080 [ 53.411150][ T11] The buggy address is located 184 bytes inside of [ 53.411150][ T11] freed 6080-byte region [ffff8880087d0040, ffff8880087d1800) [ 53.411448][ T11] [ 53.411513][ T11] The buggy address belongs to the physical page: [ 53.411669][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880087d4c00 pfn:0x87d0 [ 53.411920][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 53.412111][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 53.412273][ T11] page_type: f5(slab) [ 53.412375][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 53.412606][ T11] raw: ffff8880087d4c00 0000000000050003 00000001f5000000 0000000000000000 [ 53.412828][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 53.413053][ T11] head: ffff8880087d4c00 0000000000050003 00000001f5000000 0000000000000000 [ 53.413279][ T11] head: 0080000000000003 ffffea000021f401 ffffffffffffffff 0000000000000000 [ 53.413502][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 53.413723][ T11] page dumped because: kasan: bad access detected [ 53.413876][ T11] [ 53.413939][ T11] Memory state around the buggy address: [ 53.414063][ T11] ffff8880087cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.414248][ T11] ffff8880087d0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.414429][ T11] >ffff8880087d0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.414616][ T11] ^ [ 53.414794][ T11] ffff8880087d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.414975][ T11] ffff8880087d0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.415162][ T11] ================================================================== [ 53.415366][ T11] Disabling lock debugging due to kernel taint